Asymmetric Addition of Pyridyl Aluminum Reagents to Aldehydes Catalyzed by a Titanium(IV) Catalytic System of (R)-H8-BINOLate

2015 ◽  
Vol 80 (16) ◽  
pp. 8307-8313 ◽  
Author(s):  
Lijun Zhang ◽  
Bing Tu ◽  
Min Ge ◽  
Yimei Li ◽  
Liangyu Chen ◽  
...  
Keyword(s):  
Catalytic System ◽  
Asymmetric Addition

scholarly journals Dual metal and Lewis base catalysis approach for asymmetric synthesis of dihydroquinolines and the α-arylation of aldehydes via N-acyliminium ions

2015 ◽  
Vol 51 (87) ◽  
pp. 15788-15791 ◽  
Author(s):  
Chandra M. R. Volla ◽  
Eleonora Fava ◽  
Iuliana Atodiresei ◽  
Magnus Rueping
Keyword(s):  
Asymmetric Synthesis ◽  
Catalytic System ◽  
Optically Active ◽  
Lewis Base ◽  
Base Catalysis ◽  
Asymmetric Addition ◽  
Acyliminium Ions ◽  
Indium Triflate ◽  
Dual Metal

A dual catalytic system consisting of indium triflate and a chiral imidazolidinone catalyzes the asymmetric addition of aldehydes to N-acyl quinoliniums furnishing optically active dihydroquinolines in good yields and excellent selectivities.

ChemInform Abstract: Asymmetric Addition of Pyridyl Aluminum Reagents to Aldehydes Catalyzed by a Titanium(IV) Catalytic System of (R)-H8-BINOLate.

ChemInform ◽  
2016 ◽  
Vol 47 (3) ◽  
Author(s):  
Lijun Zhang ◽  
Bing Tu ◽  
Min Ge ◽  
Yimei Li ◽  
Liangyu Chen ◽  
...  
Keyword(s):  
Catalytic System ◽  
Asymmetric Addition

scholarly journals 1-Naphthyl-TADDOL/Emim BF4: A new catalytic system for the asymmetric addition of Chan’s diene to aromatic aldehydes

2010 ◽  
Vol 8 (6) ◽  
pp. 1172-1178 ◽  
Author(s):  
Rosaria Villano ◽  
Maria Acocella ◽  
Vincenzo Sio ◽  
Arrigo Scettri
Keyword(s):  
Ionic Liquid ◽  
Catalytic System ◽  
Nonlinear Effects ◽  
Aromatic Aldehydes ◽  
Diels Alder ◽  
Solvent Free ◽  
Asymmetric Addition ◽  
Solvent Free Conditions ◽  
Mechanistic Investigation

AbstractA new organocatalytic system was tested as a promoter for the asymmetric addition of Chan’s diene to aldehydes under solvent-free conditions. This new organocatalyst generated in situ by mixing 1-naphthyl-TADDOL derivative and Emim BF4 was able to give enantioenriched vinylogous aldols and hetero-Diels-Alder cycloadducts. A mechanistic investigation through the detection of nonlinear effects confirmed the involvement of the ionic liquid in the formation of a new catalytic supramolecular species.

Dinuclear zinc complex catalyzed asymmetric methylation and alkynylation of aromatic aldehydes

2017 ◽  
Vol 15 (34) ◽  
pp. 7147-7156 ◽  
Author(s):  
Shanshan Liu ◽  
Gao-Wei Li ◽  
Xiao-Chao Yang ◽  
De-Yang Zhang ◽  
Min-Can Wang
Keyword(s):  
Catalytic System ◽  
Zinc Complex ◽  
Aromatic Aldehydes ◽  
Asymmetric Addition ◽  
Asymmetric Methylation

A general AzePhenol dinuclear zinc catalytic system has been successfully developed and introduced into the asymmetric addition of dimethylzinc and alkynylzinc to aromatic aldehydes.

Catalytic Asymmetric Addition of Aldehydes to Oxocarbenium Ions: A Dual Catalytic System for the Synthesis of Chromenes

2012 ◽  
Vol 14 (17) ◽  
pp. 4642-4645 ◽  
Author(s):  
Magnus Rueping ◽  
Chandra M. R. Volla ◽  
Iuliana Atodiresei
Keyword(s):  
Catalytic System ◽  
Asymmetric Addition ◽  
Oxocarbenium Ions ◽  
Catalytic Asymmetric

Pilot plant plasma-catalytic system for the decomposition of a volatile organic compound

2016 ◽  
Vol 15 (3) ◽  
pp. 251-259
Author(s):  
Shreedhar Devkota ◽  
◽  
Jin Oh Jo ◽  
Dong Lyong Jang ◽  
Young Jin Hyun ◽  
...  
Keyword(s):  
Organic Compound ◽  
Catalytic System ◽  
Volatile Organic Compound ◽  
Pilot Plant ◽  
Volatile Organic

Cobalt/Lewis Acid Catalysis for Hydrocarbofunctionalization of Alkynes via Cooperative C–H Activation

2020 ◽  
Author(s):  
Chang-Sheng Wang ◽  
Sabrina Monaco ◽  
Anh Ngoc Thai ◽  
Md. Shafiqur Rahman ◽  
Chen Wang ◽  
...  
Keyword(s):  
Catalytic System ◽  
Lewis Acid ◽  
Hydrogen Transfer ◽  
Acid Catalysis ◽  
Rate Limiting Step ◽  
Site Selectivity ◽  
Set Up ◽  
Site Selective ◽  
First Time ◽  
Rate Limiting

A catalytic system comprised of a cobalt-diphosphine complex and a Lewis acid (LA) such as AlMe3 has been found to promote hydrocarbofunctionalization reactions of alkynes with Lewis basic and electron-deficient substrates such as formamides, pyridones, pyridines, and azole derivatives through site-selective C-H activation. Compared with known Ni/LA catalytic system for analogous transformations, the present catalytic system not only feature convenient set up using inexpensive and bench-stable precatalyst and ligand such as Co(acac)3 and 1,3-bis(diphenylphosphino)propane (dppp), but also display distinct site-selectivity toward C-H activation of pyridone and pyridine derivatives. In particular, a completely C4-selective alkenylation of pyridine has been achieved for the first time. Mechanistic stidies including DFT calculations on the Co/Al-catalyzed addition of formamide to alkyne have suggested that the reaction involves cleavage of the carbamoyl C-H bond as the rate-limiting step, which proceeds through a ligand-to-ligand hydrogen transfer (LLHT) mechanism leading to an alkyl(carbamoyl)cobalt intermediate.

Sign in / Sign up

Export Citation Format

Share Document